So I want to add chocolate to my next stout, and I've seen this as a method. I tried using cocoa nibs in the final 15 mins of the boil, and got virtually no flavor from it. I don't want to use a chocolate bar for fear of unwanted preservatives and whatnot. So I'm thinking of going with an organic cocoa powder to add in the boil. So the question is how much should I use for a five gallon batch? Flaked oats will also be used in the mash, and 8oz of ground coffee beans in the secondary.
Thanks for any help!